AMBRIDGE, Pa.—Hillary Clinton and Donald Trump returned to the road Monday after a tumultuous weekend and an ugly debate, with the Democratic presidential nominee focusing on her ground game and her opponent launching a renewed attack.

On the heels of their second televised showdown, both presidential campaigns declared victory and deployed to key battlegrounds. Mrs. Clinton traveled Monday to Michigan and Ohio, aiming to capitalize...

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Donald Trump and Hillary Clinton clashed over everything from his remarks about women to Syria to taxes. Watch the highlights in three minutes. Photo: Getty